/* roulang page: index */
:root {
            --bg-primary: #080d17;
            --bg-secondary: #0f1a2e;
            --bg-card: #111b30;
            --bg-card-hover: #162038;
            --bg-elevated: #182642;
            --text-primary: #e8ecf3;
            --text-secondary: #b0bccd;
            --text-muted: #6b7d95;
            --accent-blue: #4f8ef7;
            --accent-blue-hover: #3b7de8;
            --accent-blue-glow: rgba(79, 142, 247, 0.25);
            --accent-orange: #f77234;
            --accent-orange-hover: #e86228;
            --accent-teal: #00d4aa;
            --accent-teal-glow: rgba(0, 212, 170, 0.2);
            --border-subtle: #1e2d44;
            --border-card: #1a2840;
            --border-input: #243550;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
            --shadow-glow-blue: 0 0 30px rgba(79, 142, 247, 0.18);
            --shadow-glow-teal: 0 0 24px rgba(0, 212, 170, 0.14);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, 'Segoe UI', sans-serif;
            --container-max: 1260px;
            --header-height: 72px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(8, 13, 23, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-subtle);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-smooth);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            flex-shrink: 0;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

        .header-logo:hover {
            color: var(--accent-blue);
        }

        .header-logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-teal));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
            flex-shrink: 0;
            box-shadow: var(--shadow-glow-blue);
        }

        .nav-search-wrap {
            flex: 1;
            max-width: 420px;
            position: relative;
        }

        .nav-search-input {
            width: 100%;
            height: 44px;
            padding: 0 48px 0 18px;
            border-radius: var(--radius-full);
            background: var(--bg-elevated);
            border: 2px solid var(--border-input);
            color: var(--text-primary);
            font-size: 0.95rem;
            transition: all var(--transition-smooth);
        }

        .nav-search-input::placeholder {
            color: var(--text-muted);
        }

        .nav-search-input:focus {
            border-color: var(--accent-blue);
            box-shadow: var(--shadow-glow-blue);
            background: var(--bg-card-hover);
        }

        .nav-search-btn {
            position: absolute;
            right: 6px;
            top: 50%;
            transform: translateY(-50%);
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--accent-blue);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            transition: all var(--transition-smooth);
        }

        .nav-search-btn:hover {
            background: var(--accent-blue-hover);
            box-shadow: var(--shadow-glow-blue);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .nav-link {
            padding: 9px 18px;
            border-radius: var(--radius-full);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-smooth);
            white-space: nowrap;
            position: relative;
        }

        .nav-link:hover {
            color: var(--text-primary);
            background: var(--bg-elevated);
        }

        .nav-link.active {
            color: #fff;
            background: var(--accent-blue);
            box-shadow: var(--shadow-glow-blue);
        }

        .nav-cta-btn {
            padding: 10px 22px;
            border-radius: var(--radius-full);
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            background: var(--accent-orange);
            transition: all var(--transition-smooth);
            white-space: nowrap;
            box-shadow: 0 4px 16px rgba(247, 114, 52, 0.3);
        }

        .nav-cta-btn:hover {
            background: var(--accent-orange-hover);
            box-shadow: 0 6px 22px rgba(247, 114, 52, 0.45);
            transform: translateY(-1px);
        }

        .mobile-menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--bg-elevated);
            color: var(--text-primary);
            font-size: 1.3rem;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border-subtle);
            flex-shrink: 0;
        }

        /* ========== HERO ========== */
        .hero-section {
            position: relative;
            min-height: 580px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            overflow: hidden;
            padding: 80px 24px;
            background: linear-gradient(180deg, #0a1225 0%, #0d1830 40%, var(--bg-primary) 100%);
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            z-index: 0;
            pointer-events: none;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, transparent 30%, rgba(8, 13, 23, 0.85) 80%);
            z-index: 1;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            border-radius: var(--radius-full);
            background: var(--accent-teal-glow);
            border: 1px solid rgba(0, 212, 170, 0.3);
            color: var(--accent-teal);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 20px;
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.03em;
            line-height: 1.25;
            margin-bottom: 16px;
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-teal));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        .hero-search-wrap {
            max-width: 500px;
            margin: 0 auto 28px;
            position: relative;
        }

        .hero-search-input {
            width: 100%;
            height: 54px;
            padding: 0 56px 0 22px;
            border-radius: var(--radius-full);
            background: var(--bg-card);
            border: 2px solid var(--border-input);
            color: #fff;
            font-size: 1rem;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-md);
        }

        .hero-search-input::placeholder {
            color: var(--text-muted);
        }

        .hero-search-input:focus {
            border-color: var(--accent-blue);
            box-shadow: var(--shadow-glow-blue), var(--shadow-md);
        }

        .hero-search-submit {
            position: absolute;
            right: 7px;
            top: 50%;
            transform: translateY(-50%);
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--accent-blue);
            color: #fff;
            font-size: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-smooth);
        }

        .hero-search-submit:hover {
            background: var(--accent-blue-hover);
            box-shadow: var(--shadow-glow-blue);
        }

        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 30px;
            border-radius: var(--radius-full);
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            background: var(--accent-orange);
            transition: all var(--transition-smooth);
            box-shadow: 0 6px 22px rgba(247, 114, 52, 0.35);
        }

        .btn-primary:hover {
            background: var(--accent-orange-hover);
            box-shadow: 0 8px 28px rgba(247, 114, 52, 0.5);
            transform: translateY(-2px);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 30px;
            border-radius: var(--radius-full);
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            background: transparent;
            border: 2px solid var(--border-input);
            transition: all var(--transition-smooth);
        }

        .btn-outline:hover {
            border-color: var(--accent-blue);
            background: var(--bg-elevated);
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: 72px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-label {
            display: inline-block;
            padding: 5px 14px;
            border-radius: var(--radius-full);
            background: var(--accent-blue-glow);
            border: 1px solid rgba(79, 142, 247, 0.25);
            color: var(--accent-blue);
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: 2.1rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.02em;
            margin-bottom: 8px;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
        }

        /* ========== FEATURES GRID ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 30px 24px;
            text-align: center;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            border-radius: 3px;
            background: var(--accent-blue);
            opacity: 0;
            transition: all var(--transition-smooth);
        }

        .feature-card:hover {
            border-color: var(--accent-blue);
            background: var(--bg-card-hover);
            box-shadow: var(--shadow-glow-blue);
            transform: translateY(-4px);
        }

        .feature-card:hover::before {
            opacity: 1;
            width: 80px;
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: var(--bg-elevated);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.5rem;
            color: var(--accent-blue);
            transition: all var(--transition-smooth);
        }

        .feature-card:hover .feature-icon {
            background: var(--accent-blue-glow);
            box-shadow: var(--shadow-glow-blue);
        }

        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ========== CATEGORY SPOTLIGHT ========== */
        .category-spotlight {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            align-items: center;
        }

        .category-card-large {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-xl);
            overflow: hidden;
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }

        .category-card-large:hover {
            border-color: var(--accent-teal);
            box-shadow: var(--shadow-glow-teal);
            transform: translateY(-3px);
        }

        .category-card-img {
            width: 100%;
            height: 220px;
            object-fit: cover;
        }

        .category-card-body {
            padding: 24px 28px 28px;
        }

        .category-card-body h3 {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .category-card-body p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            line-height: 1.6;
        }

        .category-card-tag {
            display: inline-block;
            padding: 5px 12px;
            border-radius: var(--radius-full);
            background: var(--accent-teal-glow);
            color: var(--accent-teal);
            font-size: 0.8rem;
            font-weight: 600;
        }

        .btn-sm {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            background: var(--accent-blue);
            transition: all var(--transition-smooth);
        }

        .btn-sm:hover {
            background: var(--accent-blue-hover);
            box-shadow: var(--shadow-glow-blue);
        }

        /* ========== CMS LIST ========== */
        .cms-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .cms-list-item {
            display: flex;
            align-items: center;
            gap: 18px;
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            transition: all var(--transition-smooth);
        }

        .cms-list-item:hover {
            border-color: var(--accent-blue);
            background: var(--bg-card-hover);
            box-shadow: var(--shadow-sm);
            transform: translateX(4px);
        }

        .cms-list-thumb {
            width: 72px;
            height: 72px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg-elevated);
        }

        .cms-list-info {
            flex: 1;
            min-width: 0;
        }

        .cms-list-info h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .cms-list-info .cms-meta {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .cms-list-arrow {
            color: var(--text-muted);
            font-size: 1.1rem;
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }

        .cms-list-item:hover .cms-list-arrow {
            color: var(--accent-blue);
        }

        .cms-empty {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
            font-size: 1rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-card);
        }

        /* ========== GAME CARDS GRID ========== */
        .game-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        .game-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
        }

        .game-card:hover {
            border-color: var(--accent-orange);
            box-shadow: 0 8px 28px rgba(247, 114, 52, 0.2);
            transform: translateY(-4px);
        }

        .game-card-img-wrap {
            position: relative;
            overflow: hidden;
            height: 180px;
        }

        .game-card-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

        .game-card:hover .game-card-img {
            transform: scale(1.06);
        }

        .game-card-badge {
            position: absolute;
            top: 12px;
            right: 12px;
            padding: 5px 12px;
            border-radius: var(--radius-full);
            background: var(--accent-orange);
            color: #fff;
            font-size: 0.78rem;
            font-weight: 600;
        }

        .game-card-body {
            padding: 18px 20px 20px;
        }

        .game-card-body h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 6px;
        }

        .game-card-body .game-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }

        .game-tag {
            padding: 3px 10px;
            border-radius: var(--radius-full);
            background: var(--bg-elevated);
            color: var(--text-secondary);
            font-size: 0.78rem;
            border: 1px solid var(--border-subtle);
        }

        .game-card-body .game-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ========== STATS ========== */
        .stats-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }

        .stat-item .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.02em;
            line-height: 1;
            margin-bottom: 8px;
        }

        .stat-item .stat-number .stat-suffix {
            font-size: 1.3rem;
            color: var(--accent-blue);
            font-weight: 600;
        }

        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-smooth);
        }

        .faq-item:hover {
            border-color: var(--border-input);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            text-align: left;
            cursor: pointer;
            transition: background var(--transition-fast);
        }

        .faq-question:hover {
            background: var(--bg-card-hover);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-elevated);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            color: var(--accent-blue);
            flex-shrink: 0;
            transition: transform var(--transition-smooth);
        }

        .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.65;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--accent-blue);
            color: #fff;
        }

        /* ========== CTA ========== */
        .cta-section {
            text-align: center;
            padding: 80px 24px;
            background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
            border-top: 1px solid var(--border-subtle);
        }

        .cta-section .section-title {
            font-size: 2rem;
        }

        .cta-section .btn-primary {
            font-size: 1.1rem;
            padding: 16px 36px;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 40px 0;
            text-align: center;
        }

        .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .footer-links {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            justify-content: center;
            margin-bottom: 14px;
        }

        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent-blue);
        }

        .footer-copy {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .game-cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-spotlight {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .hero-title {
                font-size: 2.3rem;
            }
            .nav-search-wrap {
                max-width: 260px;
            }
            .header-inner {
                gap: 12px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
                gap: 10px;
                padding: 0 16px;
            }
            .nav-links {
                display: none;
            }
            .nav-links.mobile-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(8, 13, 23, 0.97);
                backdrop-filter: blur(20px);
                padding: 16px 20px;
                gap: 8px;
                border-bottom: 1px solid var(--border-subtle);
                z-index: 999;
            }
            .nav-search-wrap {
                max-width: 100%;
                order: 3;
                flex: 1 1 100%;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .nav-cta-btn {
                display: none;
            }
            .nav-cta-btn.mobile-visible {
                display: inline-flex;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .game-cards-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-title {
                font-size: 1.9rem;
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .cms-list-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .cms-list-thumb {
                width: 100%;
                height: 140px;
            }
            .category-card-img {
                height: 160px;
            }
        }

        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-section {
                min-height: 440px;
                padding: 50px 16px;
            }
            .hero-search-input {
                height: 46px;
                font-size: 0.9rem;
            }
            .btn-primary,
            .btn-outline {
                padding: 12px 22px;
                font-size: 0.9rem;
            }
            .container {
                padding: 0 14px;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #6C3CE1;
            --color-primary-dark: #5A2FBF;
            --color-primary-light: #8B5CF6;
            --color-accent: #F59E0B;
            --color-accent-dark: #D97706;
            --color-bg: #FAF8FE;
            --color-surface: #FFFFFF;
            --color-surface-alt: #F3F0FB;
            --color-text: #1E1B2E;
            --color-text-secondary: #5C5670;
            --color-text-weak: #8E89A0;
            --color-border: #E2DEF0;
            --color-border-light: #EDE9F5;
            --color-success: #10B981;
            --color-warning: #F59E0B;
            --color-error: #EF4444;
            --color-nav-bg: #FFFFFF;
            --color-footer-bg: #1E1B2E;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-sm: 0 1px 3px rgba(30, 27, 46, 0.06), 0 1px 2px rgba(30, 27, 46, 0.04);
            --shadow-md: 0 4px 12px rgba(30, 27, 46, 0.08), 0 2px 4px rgba(30, 27, 46, 0.04);
            --shadow-lg: 0 10px 30px rgba(30, 27, 46, 0.10), 0 4px 8px rgba(30, 27, 46, 0.05);
            --shadow-xl: 0 20px 50px rgba(30, 27, 46, 0.14), 0 8px 16px rgba(30, 27, 46, 0.06);
            --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1280px;
            --header-height: 70px;
        }

        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            line-height: 1.6;
            color: var(--color-text);
            background: var(--color-bg);
            min-height: 100vh;
            font-size: 16px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }

        button {
            cursor: pointer;
            border: none;
            font-family: inherit;
            transition: all var(--transition-fast);
        }

        input {
            font-family: inherit;
            border: none;
            outline: none;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--color-nav-bg);
            border-bottom: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
        }

        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            height: 100%;
            gap: 20px;
            position: relative;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-primary);
            white-space: nowrap;
            flex-shrink: 0;
            transition: opacity var(--transition-fast);
        }

        .header-logo:hover {
            opacity: 0.85;
        }

        .header-logo-icon {
            font-size: 1.5rem;
            line-height: 1;
        }

        .nav-search-wrap {
            flex: 1;
            max-width: 420px;
            position: relative;
            display: flex;
            align-items: center;
        }

        .nav-search-input {
            width: 100%;
            padding: 10px 44px 10px 16px;
            border: 2px solid var(--color-border);
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            background: var(--color-surface-alt);
            color: var(--color-text);
            transition: all var(--transition-base);
            height: 42px;
        }

        .nav-search-input:focus {
            border-color: var(--color-primary-light);
            background: var(--color-surface);
            box-shadow: 0 0 0 4px rgba(108, 60, 225, 0.08);
            outline: none;
        }

        .nav-search-input::placeholder {
            color: var(--color-text-weak);
        }

        .nav-search-btn {
            position: absolute;
            right: 6px;
            top: 50%;
            transform: translateY(-50%);
            background: var(--color-primary);
            color: #fff;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            transition: all var(--transition-fast);
        }

        .nav-search-btn:hover {
            background: var(--color-primary-dark);
            transform: translateY(-50%) scale(1.05);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }

        .nav-link {
            padding: 8px 16px;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--color-primary);
            background: rgba(108, 60, 225, 0.06);
        }

        .nav-link.active {
            color: var(--color-primary);
            background: rgba(108, 60, 225, 0.10);
            font-weight: 600;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 600;
            background: var(--color-primary);
            color: #fff;
            white-space: nowrap;
            flex-shrink: 0;
            transition: all var(--transition-base);
            box-shadow: 0 2px 8px rgba(108, 60, 225, 0.25);
        }

        .nav-cta-btn:hover {
            background: var(--color-primary-dark);
            box-shadow: 0 4px 16px rgba(108, 60, 225, 0.35);
            transform: translateY(-1px);
        }

        .nav-cta-btn:active {
            transform: translateY(0);
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            font-size: 1.5rem;
            color: var(--color-text);
            padding: 6px 8px;
            border-radius: var(--radius-sm);
            line-height: 1;
        }

        .mobile-menu-toggle:hover {
            background: var(--color-surface-alt);
        }

        .nav-cta-btn.mobile-visible {
            display: none;
        }

        @media (max-width: 1024px) {
            .nav-search-wrap {
                max-width: 280px;
            }
            .nav-link {
                padding: 8px 12px;
                font-size: 0.85rem;
            }
            .nav-cta-btn {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                gap: 12px;
            }
            .nav-search-wrap {
                max-width: 200px;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--color-nav-bg);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--color-border-light);
                box-shadow: var(--shadow-lg);
                z-index: 999;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-link {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-md);
                font-size: 0.95rem;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .nav-cta-btn.mobile-visible {
                display: inline-flex;
                width: 100%;
                margin-top: 6px;
            }
            .nav-cta-btn:not(.mobile-visible) {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                gap: 8px;
                padding: 0 14px;
            }
            .header-logo {
                font-size: 1.15rem;
                gap: 4px;
            }
            .header-logo-icon {
                font-size: 1.2rem;
            }
            .nav-search-wrap {
                max-width: 140px;
            }
            .nav-search-input {
                font-size: 0.8rem;
                padding: 8px 38px 8px 12px;
                height: 36px;
            }
            .nav-search-btn {
                width: 28px;
                height: 28px;
                font-size: 0.75rem;
                right: 4px;
            }
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            background: linear-gradient(135deg, rgba(108, 60, 225, 0.92) 0%, rgba(90, 47, 191, 0.95) 40%, rgba(30, 27, 46, 0.90) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 64px 0;
            color: #fff;
            text-align: center;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.25) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.30) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .breadcrumb .separator {
            color: rgba(255, 255, 255, 0.45);
            font-size: 0.7rem;
        }

        .breadcrumb .current {
            color: #fff;
            font-weight: 500;
        }

        .page-banner-title {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            line-height: 1.25;
        }

        .page-banner-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 620px;
            margin: 0 auto 20px;
            line-height: 1.7;
        }

        .page-banner-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            flex-wrap: wrap;
        }

        .page-banner-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        @media (max-width: 768px) {
            .page-banner {
                padding: 44px 0;
            }
            .page-banner-title {
                font-size: 2rem;
            }
            .page-banner-desc {
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .page-banner {
                padding: 32px 0;
            }
            .page-banner-title {
                font-size: 1.55rem;
            }
            .page-banner-desc {
                font-size: 0.9rem;
            }
            .page-banner-meta {
                gap: 12px;
                font-size: 0.8rem;
            }
        }

        /* ========== MAIN CONTENT AREA ========== */
        .category-main {
            padding: 56px 0;
        }

        .category-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 36px;
            align-items: start;
        }

        @media (max-width: 1024px) {
            .category-layout {
                grid-template-columns: 1fr 260px;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            .category-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        /* ========== ARTICLE LIST ========== */
        .article-list-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 28px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .article-list-title {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-text);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .article-count {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--color-primary);
            color: #fff;
            font-size: 0.78rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-full);
        }

        .sort-select {
            padding: 9px 32px 9px 14px;
            border: 2px solid var(--color-border);
            border-radius: var(--radius-full);
            font-size: 0.88rem;
            color: var(--color-text);
            background: var(--color-surface);
            cursor: pointer;
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%235C5670' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 12px center;
            transition: border-color var(--transition-fast);
        }

        .sort-select:focus {
            border-color: var(--color-primary-light);
            outline: none;
            box-shadow: 0 0 0 3px rgba(108, 60, 225, 0.07);
        }

        .articles-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 22px;
        }

        @media (max-width: 900px) {
            .articles-grid {
                grid-template-columns: 1fr;
            }
        }

        .article-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-sm);
        }

        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }

        .article-card-image-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: var(--color-surface-alt);
        }

        .article-card-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .article-card:hover .article-card-image-wrap img {
            transform: scale(1.04);
        }

        .article-card-tags {
            position: absolute;
            top: 12px;
            left: 12px;
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        .article-card-tag {
            display: inline-block;
            padding: 4px 10px;
            border-radius: var(--radius-full);
            font-size: 0.73rem;
            font-weight: 600;
            background: rgba(108, 60, 225, 0.88);
            color: #fff;
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
        }

        .article-card-body {
            padding: 18px 18px 16px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .article-card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-fast);
        }

        .article-card:hover .article-card-title {
            color: var(--color-primary);
        }

        .article-card-excerpt {
            font-size: 0.88rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
            margin-bottom: 12px;
        }

        .article-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--color-text-weak);
            padding-top: 10px;
            border-top: 1px solid var(--color-border-light);
            gap: 8px;
            flex-wrap: wrap;
        }

        .article-card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* ========== SIDEBAR ========== */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .sidebar-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 22px 20px;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
        }

        .sidebar-card-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--color-primary-light);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag-item {
            display: inline-block;
            padding: 6px 14px;
            border-radius: var(--radius-full);
            font-size: 0.82rem;
            font-weight: 500;
            background: var(--color-surface-alt);
            color: var(--color-text-secondary);
            border: 1px solid transparent;
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .tag-item:hover {
            background: rgba(108, 60, 225, 0.08);
            color: var(--color-primary);
            border-color: rgba(108, 60, 225, 0.25);
        }

        .tag-item.hot {
            background: rgba(245, 158, 11, 0.10);
            color: var(--color-accent-dark);
            font-weight: 600;
        }

        .hot-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .hot-list-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 10px 12px;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .hot-list-item:hover {
            background: var(--color-surface-alt);
        }

        .hot-list-rank {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            font-size: 0.78rem;
            font-weight: 700;
            flex-shrink: 0;
            color: #fff;
            background: var(--color-text-weak);
        }

        .hot-list-item:nth-child(1) .hot-list-rank {
            background: #EF4444;
        }
        .hot-list-item:nth-child(2) .hot-list-rank {
            background: #F59E0B;
        }
        .hot-list-item:nth-child(3) .hot-list-rank {
            background: #10B981;
        }

        .hot-list-title {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--color-text);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .hot-list-views {
            font-size: 0.75rem;
            color: var(--color-text-weak);
            margin-top: 2px;
        }

        /* ========== PAGINATION ========== */
        .pagination-wrap {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            margin-top: 36px;
            flex-wrap: wrap;
        }

        .page-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 14px;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            background: var(--color-surface);
            border: 2px solid var(--color-border-light);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .page-btn:hover {
            border-color: var(--color-primary-light);
            color: var(--color-primary);
            background: rgba(108, 60, 225, 0.04);
        }

        .page-btn.active {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            font-weight: 700;
        }

        .page-btn.disabled {
            opacity: 0.4;
            pointer-events: none;
        }

        /* ========== FAQ SECTION ========== */
        .faq-section {
            padding: 56px 0;
            background: var(--color-surface);
            border-top: 1px solid var(--color-border-light);
        }

        .section-title {
            font-size: 1.6rem;
            font-weight: 800;
            text-align: center;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .section-subtitle {
            font-size: 0.95rem;
            text-align: center;
            color: var(--color-text-secondary);
            margin-bottom: 36px;
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--color-surface-alt);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            border-color: var(--color-border);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 16px 20px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text);
            background: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }

        .faq-question::after {
            content: '+';
            font-size: 1.3rem;
            font-weight: 400;
            color: var(--color-primary);
            flex-shrink: 0;
            transition: transform var(--transition-base);
        }

        .faq-item.open .faq-question::after {
            content: '−';
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 20px 16px;
            font-size: 0.88rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: 56px 0;
            background: linear-gradient(135deg, rgba(108, 60, 225, 0.06) 0%, rgba(90, 47, 191, 0.04) 50%, rgba(245, 158, 11, 0.05) 100%);
        }

        .cta-card {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            border-radius: var(--radius-xl);
            padding: 44px 40px;
            text-align: center;
            color: #fff;
            box-shadow: var(--shadow-xl);
            position: relative;
            overflow: hidden;
        }

        .cta-card::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 180px;
            height: 180px;
            background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-card h3 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 8px;
            position: relative;
            z-index: 1;
        }

        .cta-card p {
            font-size: 1rem;
            color: rgba(255,255,255,0.88);
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-card .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: var(--radius-full);
            font-size: 1rem;
            font-weight: 700;
            background: #fff;
            color: var(--color-primary);
            transition: all var(--transition-base);
            position: relative;
            z-index: 1;
            box-shadow: 0 4px 16px rgba(0,0,0,0.15);
        }

        .cta-card .btn-cta-large:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0,0,0,0.22);
            background: #fefefe;
        }

        @media (max-width: 520px) {
            .cta-card {
                padding: 30px 20px;
            }
            .cta-card h3 {
                font-size: 1.3rem;
            }
            .cta-card p {
                font-size: 0.9rem;
            }
            .btn-cta-large {
                padding: 12px 28px;
                font-size: 0.9rem;
            }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--color-footer-bg);
            color: rgba(255,255,255,0.7);
            padding: 40px 0 24px;
        }

        .site-footer .container {
            text-align: center;
        }

        .footer-logo {
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-links {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 16px;
        }

        .footer-links a {
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-copy {
            font-size: 0.82rem;
            color: rgba(255,255,255,0.45);
            margin-top: 12px;
        }

        /* ========== SCROLL TO TOP ========== */
        .scroll-top-btn {
            position: fixed;
            bottom: 28px;
            right: 28px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-lg);
            z-index: 900;
            opacity: 0;
            pointer-events: none;
            transition: all var(--transition-base);
        }

        .scroll-top-btn.visible {
            opacity: 1;
            pointer-events: auto;
        }

        .scroll-top-btn:hover {
            background: var(--color-primary-dark);
            transform: translateY(-3px);
            box-shadow: var(--shadow-xl);
        }

        @media (max-width: 520px) {
            .scroll-top-btn {
                bottom: 18px;
                right: 16px;
                width: 38px;
                height: 38px;
                font-size: 1rem;
            }
        }

        /* ========== NO RESULTS STATE ========== */
        .no-results {
            text-align: center;
            padding: 48px 20px;
            color: var(--color-text-secondary);
        }

        .no-results-icon {
            font-size: 3rem;
            margin-bottom: 12px;
        }

        .no-results p {
            font-size: 0.95rem;
        }

/* roulang page: article */
:root {
            --primary: #5B3CE7;
            --primary-dark: #4A2EC4;
            --primary-light: #EDE9FE;
            --accent: #FF5E3A;
            --accent-hover: #FF7B5C;
            --accent-light: #FFF0EC;
            --success: #00D4AA;
            --success-light: #E6FBF7;
            --bg-page: #F3F4F8;
            --bg-card: #FFFFFF;
            --bg-dark: #0D0D1A;
            --bg-dark-secondary: #1A1A2E;
            --text: #1F1F2E;
            --text-secondary: #4B5563;
            --text-light: #6B7280;
            --text-muted: #9CA3AF;
            --text-on-dark: #F0F0F5;
            --text-on-dark-muted: #A0A0B8;
            --border: #E5E7EB;
            --border-light: #F0F1F5;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.04);
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.16);
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
            --transition-fast: 0.15s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.4s ease;
            --max-width: 1280px;
            --header-height: 72px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg-page);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            font-size: inherit;
        }

        input {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-narrow {
            width: 100%;
            max-width: 860px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-xs);
            height: var(--header-height);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow);
        }

        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
            letter-spacing: -0.3px;
            transition: opacity var(--transition-fast);
            flex-shrink: 0;
        }

        .header-logo:hover {
            opacity: 0.8;
        }

        .header-logo-icon {
            font-size: 1.5rem;
            line-height: 1;
        }

        .nav-search-wrap {
            flex: 1;
            max-width: 420px;
            position: relative;
            display: flex;
            align-items: center;
        }

        .nav-search-input {
            width: 100%;
            padding: 10px 44px 10px 18px;
            border: 2px solid var(--border);
            border-radius: 28px;
            font-size: 0.95rem;
            background: var(--bg-page);
            color: var(--text);
            transition: all var(--transition);
            outline: none;
        }

        .nav-search-input:focus {
            border-color: var(--primary);
            background: var(--bg-card);
            box-shadow: 0 0 0 4px rgba(91, 60, 231, 0.08);
        }

        .nav-search-input::placeholder {
            color: var(--text-muted);
        }

        .nav-search-btn {
            position: absolute;
            right: 6px;
            top: 50%;
            transform: translateY(-50%);
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }

        .nav-search-btn:hover {
            background: var(--primary-dark);
            box-shadow: 0 4px 14px rgba(91, 60, 231, 0.35);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            padding: 10px 22px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            background: var(--accent);
            transition: all var(--transition);
            white-space: nowrap;
            flex-shrink: 0;
            margin-left: 6px;
        }

        .nav-cta-btn:hover {
            background: var(--accent-hover);
            box-shadow: 0 6px 20px rgba(255, 94, 58, 0.35);
            transform: translateY(-1px);
        }

        .nav-cta-btn:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(255, 94, 58, 0.3);
        }

        .mobile-visible {
            display: none !important;
        }

        .mobile-menu-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text);
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            flex-shrink: 0;
            line-height: 1;
        }

        .mobile-menu-toggle:hover {
            background: var(--bg-page);
            color: var(--primary);
        }

        /* Main */
        .site-main {
            flex: 1;
            padding: 32px 0 64px;
        }

        /* Breadcrumb */
        .breadcrumb-wrap {
            padding: 16px 0 24px;
        }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
            font-size: 0.875rem;
            color: var(--text-light);
        }

        .breadcrumb a {
            color: var(--text-light);
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb-sep {
            color: var(--text-muted);
            user-select: none;
        }

        .breadcrumb-current {
            color: var(--text);
            font-weight: 500;
            max-width: 300px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* Article Card */
        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            overflow: hidden;
            margin-bottom: 40px;
        }

        .article-header {
            padding: 36px 40px 20px;
        }

        .article-category-tag {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
            transition: all var(--transition-fast);
        }

        .article-category-tag:hover {
            background: var(--primary);
            color: #fff;
        }

        .article-title {
            font-size: 1.85rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text);
            letter-spacing: -0.4px;
            margin-bottom: 14px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            font-size: 0.875rem;
            color: var(--text-light);
        }

        .article-meta-item {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .article-meta-icon {
            font-size: 1rem;
        }

        .article-featured-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            background: var(--bg-dark-secondary);
        }

        .article-body {
            padding: 32px 40px 40px;
        }

        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text);
        }

        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text);
            margin: 36px 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-light);
            letter-spacing: -0.2px;
        }

        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text);
            margin: 28px 0 12px;
            letter-spacing: -0.1px;
        }

        .article-content p {
            margin-bottom: 18px;
        }

        .article-content ul,
        .article-content ol {
            margin: 16px 0;
            padding-left: 24px;
        }

        .article-content li {
            margin-bottom: 8px;
        }

        .article-content blockquote {
            margin: 24px 0;
            padding: 18px 24px;
            background: var(--primary-light);
            border-left: 4px solid var(--primary);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        .article-content img {
            border-radius: var(--radius);
            margin: 20px 0;
            box-shadow: var(--shadow-xs);
        }

        .article-content code {
            background: var(--bg-page);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-dark);
        }

        .article-content pre {
            background: var(--bg-dark-secondary);
            color: #E8E8F0;
            padding: 20px 24px;
            border-radius: var(--radius);
            overflow-x: auto;
            margin: 20px 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .article-content a {
            color: var(--primary);
            font-weight: 500;
            text-decoration: underline;
            text-decoration-color: transparent;
            transition: text-decoration-color var(--transition-fast);
        }

        .article-content a:hover {
            text-decoration-color: var(--primary);
        }

        /* Article Footer */
        .article-footer {
            padding: 20px 40px;
            border-top: 1px solid var(--border-light);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
        }

        .article-tags-label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
        }

        .article-tag {
            display: inline-flex;
            padding: 4px 12px;
            border-radius: 16px;
            font-size: 0.8rem;
            background: var(--bg-page);
            color: var(--text-light);
            transition: all var(--transition-fast);
        }

        .article-tag:hover {
            background: var(--border);
            color: var(--text);
        }

        /* Article CTA */
        .article-cta {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            text-align: center;
            color: #fff;
            margin-bottom: 40px;
        }

        .article-cta-title {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 8px;
            letter-spacing: -0.2px;
        }

        .article-cta-desc {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 20px;
            line-height: 1.6;
        }

        .article-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 32px;
            border-radius: 28px;
            font-size: 1rem;
            font-weight: 600;
            background: #fff;
            color: var(--primary);
            transition: all var(--transition);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
        }

        .article-cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
            background: #fafaff;
        }

        .article-cta-btn:active {
            transform: translateY(0);
        }

        /* Related Section */
        .related-section {
            margin-bottom: 40px;
        }

        .related-heading {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 20px;
            letter-spacing: -0.2px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .related-heading::before {
            content: '';
            display: inline-block;
            width: 4px;
            height: 22px;
            background: var(--primary);
            border-radius: 2px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-xs);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .related-card-image {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            background: var(--bg-dark-secondary);
        }

        .related-card-body {
            padding: 14px 16px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .related-card-title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 6px;
            transition: color var(--transition-fast);
        }

        .related-card:hover .related-card-title {
            color: var(--primary);
        }

        .related-card-date {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-top: auto;
        }

        /* Not Found */
        .not-found-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 64px 40px;
            text-align: center;
            margin-bottom: 40px;
        }

        .not-found-icon {
            font-size: 4rem;
            margin-bottom: 20px;
            display: block;
        }

        .not-found-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }

        .not-found-desc {
            font-size: 1rem;
            color: var(--text-light);
            margin-bottom: 28px;
            line-height: 1.7;
        }

        .not-found-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 24px;
            font-size: 0.95rem;
            font-weight: 600;
            background: var(--primary);
            color: #fff;
            transition: all var(--transition);
        }

        .not-found-btn:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 20px rgba(91, 60, 231, 0.35);
            transform: translateY(-2px);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-on-dark);
            padding: 48px 0 32px;
            margin-top: auto;
        }

        .footer-logo {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: -0.2px;
            color: #fff;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-bottom: 20px;
        }

        .footer-links a {
            color: var(--text-on-dark-muted);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-copy {
            font-size: 0.85rem;
            color: var(--text-on-dark-muted);
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        /* Spacing utilities */
        .mb-0 {
            margin-bottom: 0 !important;
        }

        .mb-20 {
            margin-bottom: 20px !important;
        }

        /* Responsive - Tablet */
        @media (max-width: 1024px) {
            .nav-search-wrap {
                max-width: 280px;
            }

            .article-header {
                padding: 28px 28px 16px;
            }

            .article-body {
                padding: 24px 28px 32px;
            }

            .article-footer {
                padding: 16px 28px;
            }

            .article-cta {
                padding: 28px 28px;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .article-title {
                font-size: 1.55rem;
            }

            .container-narrow {
                padding: 0 20px;
            }
        }

        /* Responsive - Mobile */
        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
            }

            .header-inner {
                gap: 10px;
                padding: 0 16px;
                flex-wrap: wrap;
                position: relative;
            }

            .header-logo {
                font-size: 1.15rem;
                gap: 5px;
            }

            .header-logo-icon {
                font-size: 1.25rem;
            }

            .nav-search-wrap {
                order: 3;
                flex: 1 1 100%;
                max-width: 100%;
                margin: 0;
            }

            .nav-search-input {
                padding: 9px 40px 9px 14px;
                font-size: 0.875rem;
                border-radius: 22px;
            }

            .nav-search-btn {
                width: 32px;
                height: 32px;
                right: 4px;
                font-size: 0.85rem;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-card);
                flex-direction: column;
                gap: 2px;
                padding: 12px 16px;
                border-bottom: 2px solid var(--border-light);
                box-shadow: var(--shadow-md);
                z-index: 99;
                border-radius: 0 0 var(--radius) var(--radius);
            }

            .nav-links.show {
                display: flex;
            }

            .nav-link {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 0.95rem;
            }

            .mobile-visible {
                display: inline-flex !important;
                width: 100%;
                justify-content: center;
                margin-top: 8px;
                margin-left: 0;
            }

            .mobile-menu-toggle {
                display: block;
            }

            .nav-cta-btn:not(.mobile-visible) {
                display: none;
            }

            .site-main {
                padding: 20px 0 40px;
            }

            .breadcrumb-wrap {
                padding: 8px 0 16px;
            }

            .breadcrumb {
                font-size: 0.8rem;
            }

            .article-card {
                border-radius: var(--radius);
                margin-bottom: 28px;
            }

            .article-header {
                padding: 22px 18px 14px;
            }

            .article-title {
                font-size: 1.3rem;
            }

            .article-meta {
                gap: 10px;
                font-size: 0.8rem;
            }

            .article-body {
                padding: 18px 18px 26px;
            }

            .article-content {
                font-size: 0.95rem;
                line-height: 1.75;
            }

            .article-content h2 {
                font-size: 1.25rem;
                margin: 26px 0 12px;
            }

            .article-content h3 {
                font-size: 1.1rem;
                margin: 20px 0 10px;
            }

            .article-footer {
                padding: 14px 18px;
                gap: 8px;
            }

            .article-cta {
                padding: 24px 20px;
                border-radius: var(--radius);
                margin-bottom: 28px;
            }

            .article-cta-title {
                font-size: 1.1rem;
            }

            .article-cta-desc {
                font-size: 0.875rem;
            }

            .article-cta-btn {
                padding: 11px 24px;
                font-size: 0.9rem;
            }

            .related-heading {
                font-size: 1.1rem;
            }

            .related-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .related-card-body {
                padding: 10px 12px 14px;
            }

            .related-card-title {
                font-size: 0.82rem;
            }

            .not-found-card {
                padding: 40px 24px;
            }

            .not-found-icon {
                font-size: 3rem;
            }

            .not-found-title {
                font-size: 1.3rem;
            }

            .container-narrow {
                padding: 0 14px;
            }

            .container {
                padding: 0 16px;
            }

            .site-footer {
                padding: 32px 0 24px;
            }

            .footer-links {
                gap: 16px;
            }
        }

        @media (max-width: 520px) {
            .related-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .article-title {
                font-size: 1.15rem;
            }

            .article-header {
                padding: 18px 14px 12px;
            }

            .article-body {
                padding: 14px 14px 22px;
            }

            .article-content {
                font-size: 0.9rem;
            }

            .article-footer {
                padding: 12px 14px;
            }

            .breadcrumb-current {
                max-width: 160px;
            }
        }

        /* Focus visible */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* Selection */
        ::selection {
            background: var(--primary-light);
            color: var(--primary-dark);
        }